When a variable has a specified asm name, but isn't using the register storage class, the asm name doesn't specify a register. PR12244.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152873 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index b2da32b..e65c5f4 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -1295,6 +1295,8 @@
const VarDecl *Variable = dyn_cast<VarDecl>(&Value);
if (!Variable)
return Constraint;
+ if (Variable->getStorageClass() != SC_Register)
+ return Constraint;
AsmLabelAttr *Attr = Variable->getAttr<AsmLabelAttr>();
if (!Attr)
return Constraint;
diff --git a/test/CodeGen/asm-variable.c b/test/CodeGen/asm-variable.c
index a37132d..dc087bd 100644
--- a/test/CodeGen/asm-variable.c
+++ b/test/CodeGen/asm-variable.c
@@ -57,3 +57,9 @@
}
// CHECK: call i64 asm "call *$1", "={rax},r,{xmm0},{xmm1},{xmm2},{xmm3},{xmm4},{xmm5},{xmm6},{xmm7},~{dirflag},~{fpsr},~{flags}
+
+int randomvar asm("randomvar");
+void foo3() {
+ asm("vartest %0" : : "r"(randomvar));
+}
+// CHECK: call void asm sideeffect "vartest $0", "r,~{dirflag},~{fpsr},~{flags}"